diff --git a/GenericNtuple/plugins/FlatCandProducer.cc b/GenericNtuple/plugins/FlatCandProducer.cc
new file mode 100644
index 0000000000000..61de6570f5f7e
--- /dev/null
+++ b/GenericNtuple/plugins/FlatCandProducer.cc
@@ -0,0 +1,130 @@
+#include "FWCore/Framework/interface/Frameworkfwd.h"
+#include "FWCore/Framework/interface/EDProducer.h"
+#include "FWCore/Framework/interface/MakerMacros.h"
+
+#include "FWCore/Framework/interface/Event.h"
+#include "FWCore/Framework/interface/EventSetup.h"
+#include "FWCore/MessageLogger/interface/MessageLogger.h"
+#include "FWCore/ParameterSet/interface/ParameterSet.h"
+#include "FWCore/Utilities/interface/InputTag.h"
+
+#include "DataFormats/Common/interface/View.h"
+#include "DataFormats/Candidate/interface/LeafCandidate.h"
+#include "DataFormats/Common/interface/OneToValue.h"
+#include "DataFormats/PatCandidates/interface/Muon.h"
+#include "DataFormats/PatCandidates/interface/Electron.h"
+#include "DataFormats/PatCandidates/interface/Jet.h"
+
+#include "CommonTools/Utils/interface/StringObjectFunction.h"
+
+#include <memory>
+#include <vector>
+#include <string>
+#include <boost/assign.hpp>
+#include <boost/algorithm/string.hpp>
+
+using namespace std;
+using namespace boost::assign;
+
+class FlatCandProducer : public edm::EDProducer
+{
+public:
+  FlatCandProducer(const edm::ParameterSet& pset);
+  void produce(edm::Event& event, const edm::EventSetup& eventSetup);
+ 
+private:
+  typedef std::vector<double> doubles;
+  typedef std::vector<std::string> strings;
+
+  typedef std::vector<reco::LeafCandidate> Cands;
+  typedef edm::ValueMap<double> CandValueMap;
+  typedef edm::RefProd<Cands> CandRefProd;
+  typedef edm::Ref<Cands> CandRef;
+
+  edm::InputTag srcLabel_;
+  std::vector<StringObjectFunction<reco::Candidate,true> > exprs_;
+  std::vector<edm::InputTag> vmapLabels_;
+
+  strings varNames_;
+  std::vector<doubles> values_;
+
+};
+
+FlatCandProducer::FlatCandProducer(const edm::ParameterSet& pset)
+{
+  srcLabel_ = pset.getParameter<edm::InputTag>("src");
+  edm::ParameterSet vars = pset.getParameter<edm::ParameterSet>("variables");
+
+  const strings strVars = vars.getParameterNamesForType<std::string>();
+  for ( int i=0, n=strVars.size(); i<n; ++i )
+  {
+    const string& varName = strVars[i];
+    const string& varExpr = vars.getParameter<string>(varName);
+    exprs_.push_back(StringObjectFunction<reco::Candidate,true>(varExpr));
+    varNames_.push_back(varName);
+  }
+  const strings vmapNames = vars.getParameterNamesForType<edm::InputTag>();
+  for ( int i=0, n=vmapNames.size(); i<n; ++i )
+  {
+    const string& vmapName = vmapNames[i];
+    edm::InputTag vmapLabel = vars.getParameter<edm::InputTag>(vmapName);
+    vmapLabels_.push_back(vmapLabel);
+    varNames_.push_back(vmapName);
+  }
+
+  values_.resize(varNames_.size());
+
+  produces<Cands>();
+  for ( int i=0, n=varNames_.size(); i<n; ++i )
+  {
+    produces<CandValueMap>(varNames_[i]);
+  }
+}
+
+void FlatCandProducer::produce(edm::Event& event, const edm::EventSetup& eventSetup)
+{
+  edm::Handle<edm::View<reco::Candidate> > srcHandle;
+  event.getByLabel(srcLabel_, srcHandle);
+
+  const size_t nExpr = exprs_.size();
+  const size_t nVmap = vmapLabels_.size();
+  std::vector<edm::Handle<edm::ValueMap<double> > > vmapHandles(nVmap);
+  for ( size_t i=0; i<nVmap; ++i )
+  {
+    event.getByLabel(vmapLabels_[i], vmapHandles[i]);
+  }
+
+  std::auto_ptr<Cands> cands(new Cands);
+
+  // Fill informations
+  for ( size_t i=0, n=srcHandle->size(); i<n; ++i )
+  {
+    edm::Ref<edm::View<reco::Candidate> > candRef(srcHandle, i);
+    reco::LeafCandidate cand(candRef->charge(), candRef->p4());
+    cands->push_back(cand);
+    for ( size_t j=0; j<nExpr; ++j )
+    {
+      values_[j].push_back(exprs_[j](*candRef));
+    }
+    for ( size_t j=0; j<nVmap; ++j )
+    {
+      values_[j+nExpr].push_back((*vmapHandles[j])[candRef]);
+    }
+  }
+
+  edm::OrphanHandle<Cands> outHandle = event.put(cands);
+  for ( size_t i=0, n=nExpr+nVmap; i<n; ++i )
+  {
+    std::auto_ptr<CandValueMap> vmap(new CandValueMap);
+    CandValueMap::Filler filler(*vmap);
+    filler.insert(outHandle, values_[i].begin(), values_[i].end());
+    filler.fill();
+    values_[i].clear();
+
+    const std::string& varName = varNames_[i];
+    event.put(vmap, varName);
+  }
+}
+
+DEFINE_FWK_MODULE(FlatCandProducer);
+
diff --git a/GenericNtuple/plugins/FlatCandToNtupleMaker.cc b/GenericNtuple/plugins/FlatCandToNtupleMaker.cc
new file mode 100644
index 0000000000000..08bdb4338c28d
--- /dev/null
+++ b/GenericNtuple/plugins/FlatCandToNtupleMaker.cc
@@ -0,0 +1,144 @@
+#include "FWCore/Framework/interface/Frameworkfwd.h"
+#include "FWCore/Framework/interface/EDAnalyzer.h"
+#include "FWCore/Framework/interface/MakerMacros.h"
+
+#include "FWCore/Framework/interface/Event.h"
+#include "FWCore/Framework/interface/EventSetup.h"
+#include "FWCore/Framework/interface/LuminosityBlock.h"
+#include "FWCore/MessageLogger/interface/MessageLogger.h"
+#include "FWCore/ParameterSet/interface/ParameterSet.h"
+#include "FWCore/Utilities/interface/InputTag.h"
+#include "DataFormats/Common/interface/MergeableCounter.h"
+
+#include "FWCore/ServiceRegistry/interface/Service.h"
+#include "CommonTools/UtilAlgos/interface/TFileService.h"
+
+#include "DataFormats/Common/interface/View.h"
+#include "DataFormats/Common/interface/ValueMap.h"
+#include "DataFormats/Candidate/interface/LeafCandidate.h"
+
+#include "KrAFT/GenericNtuple/interface/GenericEvent.h"
+
+#include "TTree.h"
+#include "TH1F.h"
+
+#include <memory>
+#include <vector>
+#include <string>
+
+using namespace std;
+using namespace edm;
+
+class FlatCandToNtupleMaker : public edm::EDAnalyzer
+{
+public:
+  FlatCandToNtupleMaker(const edm::ParameterSet& pset);
+  ~FlatCandToNtupleMaker() {};
+
+  void analyze(const edm::Event& event, const edm::EventSetup& eventSetup);
+
+private:
+  typedef std::vector<double> doubles;
+  typedef std::vector<std::string> strings;
+  typedef std::vector<edm::InputTag> VInputTag;
+
+  std::vector<edm::InputTag> candLabels_;
+  std::vector<VInputTag> vmapLabels_;
+
+  TTree* tree_;
+  std::vector<doubles*> candPt_, candEta_, candPhi_, candM_;
+  std::vector<std::vector<doubles*> > candVars_;
+
+};
+
+FlatCandToNtupleMaker::FlatCandToNtupleMaker(const edm::ParameterSet& pset)
+{
+  // Output histograms and tree
+  edm::Service<TFileService> fs;
+  tree_ = fs->make<TTree>("event", "event");
+
+  edm::ParameterSet candPSets = pset.getParameter<edm::ParameterSet>("cands");
+  const strings candNames = candPSets.getParameterNamesForType<edm::ParameterSet>();
+  for ( size_t i=0, n=candNames.size(); i<n; ++i )
+  {
+    const string& candName = candNames[i];
+    edm::ParameterSet candPSet = candPSets.getParameter<edm::ParameterSet>(candName);
+    candLabels_.push_back(candPSet.getParameter<edm::InputTag>("src"));
+
+    candPt_ .push_back(new doubles);
+    candEta_.push_back(new doubles);
+    candPhi_.push_back(new doubles);
+    candM_  .push_back(new doubles);
+
+    tree_->Branch((candName+"_pt" ).c_str(), candPt_ .back());
+    tree_->Branch((candName+"_eta").c_str(), candEta_.back());
+    tree_->Branch((candName+"_phi").c_str(), candPhi_.back());
+    tree_->Branch((candName+"_m"  ).c_str(), candM_  .back());
+
+    vmapLabels_.push_back(VInputTag());
+    candVars_.push_back(std::vector<doubles*>());
+    const string candLabelName = candLabels_.back().label();
+    const strings vmapNames = candPSet.getParameter<strings>("vmaps");
+    for ( size_t j=0, m=vmapNames.size(); j<m; ++j )
+    {
+      const string& vmapName = vmapNames[j];
+      candVars_.back().push_back(new doubles);
+      vmapLabels_.back().push_back(edm::InputTag(candLabelName, vmapName));
+
+      tree_->Branch((candName+"_"+vmapName).c_str(), candVars_.back().back());
+    }
+  }
+
+}
+
+void FlatCandToNtupleMaker::analyze(const edm::Event& event, const edm::EventSetup& eventSetup)
+{
+  typedef edm::View<reco::LeafCandidate> Cands;
+
+  const size_t nCand = candLabels_.size();
+  for ( size_t iCand=0; iCand < nCand; ++iCand )
+  {
+    edm::Handle<Cands> srcHandle;
+    event.getByLabel(candLabels_[iCand], srcHandle);
+
+    VInputTag vmapLabels = vmapLabels_[iCand];
+    const size_t nVar = vmapLabels.size();
+    std::vector<edm::Handle<edm::ValueMap<double> > > vmapHandles(nVar);
+    for ( size_t iVar=0; iVar<nVar; ++iVar )
+    {
+      event.getByLabel(vmapLabels[iVar], vmapHandles[iVar]);
+    }
+
+    for ( size_t i=0, n=srcHandle->size(); i<n; ++i )
+    {
+      edm::Ref<Cands> candRef(srcHandle, i);
+      candPt_[iCand]->push_back(candRef->pt());
+      candEta_[iCand]->push_back(candRef->eta());
+      candPhi_[iCand]->push_back(candRef->phi());
+      candM_[iCand]->push_back(candRef->mass());
+
+      for ( size_t iVar=0; iVar<nVar; ++iVar )
+      {
+        const double var = (*vmapHandles[iVar])[candRef];
+        candVars_[iCand][iVar]->push_back(var);
+      }
+    }
+  }
+
+  tree_->Fill();
+  for ( size_t iCand=0; iCand<nCand; ++iCand )
+  {
+    candPt_ [iCand]->clear();
+    candEta_[iCand]->clear();
+    candPhi_[iCand]->clear();
+    candM_  [iCand]->clear();
+    const size_t nVar = candVars_[iCand].size();
+    for ( size_t iVar=0; iVar<nVar; ++iVar )
+    {
+      candVars_[iCand][iVar]->clear();
+    }
+  }
+}
+
+DEFINE_FWK_MODULE(FlatCandToNtupleMaker);
+
diff --git a/GenericNtuple/python/flatCands_cfi.py b/GenericNtuple/python/flatCands_cfi.py
new file mode 100644
index 0000000000000..8a05169101018
--- /dev/null
+++ b/GenericNtuple/python/flatCands_cfi.py
@@ -0,0 +1,62 @@
+import FWCore.ParameterSet.Config as cms
+
+flatMuons = cms.EDProducer("FlatCandProducer",
+    src = cms.InputTag("goodMuons"),
+    variables = cms.PSet(
+        #isTight = cms.string("userInt('isTight')"),
+        #isLoose = cms.string("userInt('isLoose')"),
+        relIso = cms.string("userIso(1)"),
+        dxy = cms.string("dB"),
+        dz = cms.string("userFloat('dz')"),
+    ),
+)
+
+flatElectrons = cms.EDProducer("FlatCandProducer",
+    src = cms.InputTag("goodElectrons"),
+    variables = cms.PSet(
+        mva = cms.string("electronID('mvaTrigV0')"),
+        relIso = cms.string("userIso(2)"),
+        scEta = cms.string("superCluster.eta"),
+        dxy = cms.string("dB"),
+        dz = cms.string("userFloat('dz')"),
+        #chargeID = cms.string("isGsfCtfScPixChargeConsistent ? 3 : isGsfScPixChargeConsistent ? 2 : isGsfCtfChargeConsistent ? 1 : 0"),
+    ),
+)
+
+flatJets = cms.EDProducer("FlatCandProducer",
+    src = cms.InputTag("goodJets"),
+    variables = cms.PSet(
+        bTagCSV = cms.string("bDiscriminator('combinedSecondaryVertexBJetTags')"),
+        up = cms.InputTag("goodJets", "up"),
+        dn = cms.InputTag("goodJets", "dn"),
+        res = cms.InputTag("goodJets", "res"),
+        resUp = cms.InputTag("goodJets", "resUp"),
+        resDn = cms.InputTag("goodJets", "resDn"),
+    ),
+)
+
+fEvent = cms.EDAnalyzer("FlatCandToNtupleMaker",
+    cands = cms.PSet(
+        muons = cms.PSet(
+            src = cms.InputTag("flatMuons"),
+            vmaps = cms.vstring(
+                #"isTight", "isLoose",
+                "relIso", "dxy", "dz",
+            ),
+        ),
+        electrons = cms.PSet(
+            src = cms.InputTag("flatElectrons"),
+            vmaps = cms.vstring(
+                "mva", "scEta",
+                "relIso", "dxy", "dz",
+                #"chargeID",
+            ),
+        ),
+        jets = cms.PSet(
+            src = cms.InputTag("flatJets"),
+            vmaps = cms.vstring(
+                "bTagCSV", "up", "dn", "res", "resUp", "resDn",
+            ),
+        ),
+    ),
+)